sencond-hand value

I know roughly how the PARF and COE rebate work. but confused on how the car is valued in the eyes of the car dealer and second-hand car buyer. My car is a 2009 325i coupe, mileage 70k+. The quote I got from the dealer is $45000 (gov.rebate+$9000 body value). The registration month is Oct.28 If...